[MRCA] VRC-12 update

[Chance Wolf]

I’ve had five or six instances of the antenna T/R relays and main filter going on the 246s and 524s...the first probably just because too many cycles just wore it out (and cleaning the contacts/ trying to adjust the tension etc. does not work), and the filters seem to expire just through rough handling.   A bunch of the 246s also came up that had the front and back of the radio separated – A2000 (I think it was) removed – and then reassembled haphazardly, with no care given to alignment of the various drive slots/ sockets.   The two that I’ve personally come across were ex-WIARNG where A2000 was replaced subsequently, but the radio was still all over the place performance wise. 

I also had one with poor sensitivity where I think I found that a bunch of the spring contacts that go from board-to-board in A1000 were making poor or no contact, and a couple of the bandswitches were physically broken and/or intermittent.  That radio must’ve been a trainer or something because it appears the sub-boards within A1000 had an excessive number of insertion/ removal cycles to cause that sort of wear, or someone just filled it up with various bad components to be able to sell it as ‘complete’. 



From: Ray Fantini 
Sent: Tuesday, May 31, 2016 8:25 AM
To: milsurplus ; mrca at mailman.qth.net 
Subject: [MRCA] VRC-12 update

An update on the RT-246/VRC-12 project, after much downloading I now have the complete set of manuals for the entire family of the VRC-12 series, interesting to find several sites that will allow you to download but don’t include the foldouts and being that the foldouts have all the (...)  I am happier with the VRC-12 family of components installed on the mutt then with the newer stuff that I was thinking of installing and its turning into a theme of trying to have equipment form the seventies and eighties. Thanks again for everyone who provided links and other assistance.

 

Ray F/KA3EKH

 

 
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